Electric-wire service box



" w. T.' OHMAN ELECTRIC WIRE SERVICE BOX Fileduly zo. 192e ,.llllll MayV28, 1929.

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Patented May 28, 1929. l

UNITED STATES WILLIHaJan T. OHMAN, or GREAT rams imwlomr.

ELECTRIC-WIRE SER-VICE BOX.k

'Application led July 20, 1926. Serial No. 123,674.

This invention relates to boxes for use in connection' with vbuildin gsof various kinds and classes to provide a'suitable entrance andprotection for electric service wres;'-and the -object of the'invention'is to provide 4ai box of the class and Vfor the purposespecified having'- an 4upwardly and outwardly projecting lhood portioninto and throughwhich the servicewires-ar'e adapted to be passed', saidhood portion preventing rain andthe like'from entering the box or case;-a 'further ob)- ect being to provide-within a boi or case a :bloei-kofinsulating material in connection with which Iis mounted two spring fuseclips -arr'angedfn spaced relation withl means for coupling wireswithsaid clips; 'a furtherobjeclt being to provide a cap o r guard ofinsulating material for said blockfwith meansforretaining a fuse inconnection with said cap or guard whereby the placement of the cap orguard in position will place the fuse supported thereby in the clips ofsaid block, and further whereby the fuse may be removed from the clipswhenever desired without danger of the operator coming in contact withlive wires or the terminals of said wires, the box being provided with adetachable cover permitting the insertion and and removal of the cap orguard as well as the assemblage of the several parts of the device; andwith these and other objects in view, the invention consists in a deviceof the class and for the purpose specified which is simple inconstruction, efiicient in use, and which is constructed as hereinafterdescribed and claimed.

The invention is fully disclosed in the following specilication, ofwhich the accompanying drawing forms a part. in which the separate partsof my improvement are designated by suitable reference characters ineach of the views, and in which Fig. 1 is a longitudinal, sectional viewthrough my improved box and indicating the method of its use.

Fig. 2 is a. face View of the box with part of the construction brokenaway.

Fig. 3 is a section on the line 3 3 of Fig. 1.

Fig. 4 is a face View of the cap or guard employed; and,

Fig. 5 is a face view of the insulated fuse clip block emploved.

In practice, I provide an oblong, rectangular metal box or casing 10,the front wall of which is open as seen at 11 and adapted to be closedby a removable cover member 12. IThe front top portion of the box orcase is provided with an upwardly and outwardly'directed `hood 13 havinga'downwardly direct-cd'open end 14 closed'byas'trip ofinsulating-material-15 apertureclto receiveI the positive and negativeelectric conductorsl 1f'and-17'from a suitable source of electric supplywhich ex'- tend into' and through the box or'caseff Mounted inconnection with the back' wall of the boxor c'as'e is la'bloc'kf18composed of 'any suitable f insulatingmateriahsuch as' 'porcelain,bakelite,hard'rubber, etc.an'd`niount ed Von the outer face ofsaid'blockat spaced interval'sjare'spring fuse clips 191a-n'd20, saidspring lcli-pshavingaibular terminals' 19a and 20?l` at one 'sidethereof 'to lreceive Vfthe positive "circuitwire'orl condu'ctoril'fjandthe extension f1t- '16*ll thereofa's seen' i2' olf the draw-ing? ffIalso-eurploy a cap-'tor protector 21-'con'rposed of suitable insulatingmaterial the same as the structure of the block 18. Said cap orprotector is substantially U-shaped in formin cross section to provide acompartment extending longitudinally therethrough in which a fuse 22 isadapted to be supported on two spaced rests or supports 23 havingarc-shaped surfaces 23a. The fuse 22 is held against displacement fromthe cap 21 by a strap 24, one end of which is secured to the cap 21 asseen at 25 and the other end of which is hoolishaped in form as seen at26 and adapted to engage a clip 27 supported in connection with the cap21 as seen at 28. The strap 24 is positioned between the supports 23 asseen in Fig. 4 of the drawing, and in conjunction with said supports,will serve to lixedly retain the fuse 22 against displacement in the capor protector 21.

The arrangenient of the fuse 22 in the cap 21 is such that when said capis placed in position, the terminals at the ends of the fuse will passinto the spring clips 19 and 2O and said clips will serve to retain thefuse, as well as the cap 21, in position. Whenever it is desired tosubstitute a new fuse for an old one, or one which has blown out, thecover 12 of the box or case 10 is removed and the cap or protector 21grasped by the hand and pulled outwardly to disengage the fuse 22 fromthe clips 19 and 20, and the fuse may be removed by loosening the strap24 and a new fuse substituted and replaced in the fuse clips. Theseoperations are accomplished without any danger whatever of the handcoming in contact with live wires, which might cause serious injury tothe operator. At the same time, the cap 21 serves to protect and guardthe 4fuse to preventdestruetion thereto.

It will be understood that it is preferred that the live orpositivesideofan electric circuit supply, for example the Wire 16, becoupled with one of the terminals or fuse clips, namely the elip 19, andthe extension oi such wire, for example the wire laggloe coupled withthe other of said clips; while the other of the circuit Wires -17 passesinto and through the box or case Without Contact inany vway with thefuse or useclips, both of the wires 16a and 17 passing-ontthroughthe'bottom of the box or case 10-through. a metal tube .or pipe 29eoupledivithuthe case 10 and being direetedto the house-current supply.

It will be understood, however, .that my invention is not neessarilylimited ,to the specific arrangement or eoupling yof,,thewires hereinshown and deseribeh-noi-amg necessarily limited to the,speeifie,structure ofthe box or ease or the severalparts-thereoffortothe use of a single fuse, and variouslehange in and modiieatons ,of theConstruction liereinset out-may be vmade vwthinthe scope of the appendedclaim Without :departing from the Spirit. of my invention or`sacrificing its advantages.

Having fully described my invention, what .'z

ythe opposite ends thereof, one of said bodies having centrally thereof:spaeedarcuate-bearings forming a seat ffoiva fuse, .and .a zstrapintermediatezsaid bearings-,for .retainingithe fuse against.displacei'nent from said seat; and the other of .said bodies having'spaced `U -siiaped spring .terminals adapted to engage thegterminalendsof-ithe fuse supported in "connection with the other body -and ttosupport said other bodyy in connection with thelastnamedjhody.v Y.

In testimony that .l ,claim ,the foregoing as vmy invention .lhavesigned my. nameithis -ltlrdayo'dul1926. l v ,Y z

- v WILLIHARD T.` QHMABL

